Senior Mechanical Engineer - Water / Wastewater

Senior Mechanical Engineer - UK Water / Wastewater

Water | Wastewater | Biosolids/Sludge | AMP 8 | SROs | MEP-Led Team

Shape the Future of Water Infrastructure with Egis

• London | Bristol | Manchester (Hybrid)
• Mechanical Engineering Design | UK-Wide Impact | High-Growth Environment

Egis is expanding rapidly in the UK, backed by a global team of more than 23,500 experts across 70+ countries. We design and deliver intelligent, sustainable infrastructure to address climate challenges and strengthen community resilience. As part of our fast-growing UK Water team, you will join an agile environment where progression is quick, visibility is high, and your impact is immediate.

About the Role

The UK water sector is entering a period of unprecedented investment and transformation. As Egis accelerates the growth of its Water Business in the UK, we are building a high-performing Mechanical Engineering team to help shape this next chapter.

We are inviting applicants who want to play a meaningful role in delivering major water and wastewater programmes in the UK. Working within a collaborative, multidisciplinary environment, you will contribute to technically robust, sustainable and innovative treatment solutions across nationally significant projects.

This is a rare opportunity to join at a key stage of our UK growth journey, helping to establish, shape and expand a Mechanical engineering capability built on Egis’ global infrastructure expertise and long-term commitment to the sector.

Key Responsibilities

• Lead defined mechanical design tasks or work packages across feasibility, optioneering, concept, outline and detailed design.
• Prepare, check and coordinate mechanical deliverables including calculations, specifications, datasheets, schedules, P&IDs, layouts, design reports and procurement documentation.
• Take ownership of assigned mechanical packages, managing technical quality, interfaces, scope, budget, programme and change.
• Lead site surveys, data reviews and technical discussions with clients, operators, suppliers, contractors and technology providers.
• Develop mechanical solutions for pumps, pipework, valves, tanks, lifting systems, screens, grit removal, odour control, packaged plant and associated treatment assets.
• Coordinate interfaces with Process, EICA, civil/structural, architectural and construction teams, including MEP integration, access, lifting, maintainability and constructability.
• Support CDM/safety-by-design reviews, HAZOP/SWIFT input, technical risk management, commissioning strategies and performance testing.
• Review supplier/contractor submissions, respond to technical queries and support construction, commissioning and handover where required.
• Mentor Engineers and Graduates and contribute to mechanical standards, templates and delivery improvements.

Minimum Requirements

• BEng/MEng or equivalent in Mechanical Engineering.
• Chartered Engineer status, or significant CEng-level experience while actively progressing towards chartership.
• Typically 6+ years’ relevant mechanical engineering design experience.
• Background must be from water, wastewater, biosolids/bioresources or oil & gas.
• Proven ability to deliver mechanical design packages within multidisciplinary projects.
• Strong practical experience with mechanical equipment selection, pumping systems, pipework, valves, hydraulics, layouts and packaged plant.
• Ability to prepare and check mechanical calculations, specifications, datasheets, schedules, reports, drawings and procurement documentation.
• Working knowledge of UK water industry standards, CDM 2015, safety-by-design and relevant mechanical requirements.
• Good commercial awareness and ability to deliver to agreed scope, budget and programme.
• Strong communication skills, including ability to lead technical discussions and present recommendations clearly.

Desirable Skills / Knowledge

• Experience with AMP8, WINEP, SROs, D&B, framework, alliance or major capital delivery environments.
• Experience in sludge/bioresources, water reuse, pumping stations, energy recovery, odour control, chemical dosing, package plant, offsite manufacture or low-carbon mechanical solutions.
• Experience with BIM/3D coordination, hydraulic modelling, pump system analysis, digital calculations, Power BI, Python, VBA or advanced Excel.
• Experience supporting FAT/SAT, commissioning, performance testing, HAZOPs, SWIFT reviews or technical assurance reviews.
• Experience mentoring junior staff and improving mechanical workflows, templates or technical standards.

Please note that you must have the right to work in the UK to be considered for this position.

What’s in It for You?

• An exciting new growth role in a fast-organic growing UK business, offering clear and accelerated career progression
• Top Employers 2025 - Egis recognised across four continents for excellence in HR practices, having been awarded the prestigious Top Employer 2025 certification. Top Employers Institute is the global authority on recognising excellence in people practices.
• A global leader in green infrastructure - we’re proud to lead the way in sustainable infrastructure, mobility and energy, innovating across the entire value chain and every aspect of the built environment.
• Highly competitive reward package
• Hybrid and flexible working
• 26+ days annual leave plus bank holidays
• Professional development, chartership support & global mobility
• Supportive, inclusive culture driven by sustainability and long-term community impact

Ready to Lead?

Join Egis and play a pivotal role in shaping the future of sustainable water infrastructure across the UK.

We are committed to our planet

In each project we design, engineer and operate we care deeply about the legacy we’re leaving behind. As part of our team, you’ll have a unique opportunity to use your skills and expertise to shape a better future for our communities in the UK, and all around the globe.

Our commitment is translated in the work carried out by our Egis Foundation, which funds concrete actions to address the climate crisis and is focused on educational and social initiatives that will help in the responsible and sustainable shift towards a sustainable world.

We are an Equal Opportunities employer and we strive to build a workforce that truly reflects the communities we represent. We welcome candidates from all backgrounds, regardless of age, disability, gender, gender identity, gender expression, race, religion or belief, sexual orientation, socioeconomic background, and any other protected characteristic. If you decide to apply for an opportunity with us, your application will be assessed based purely on your experience, the essential and desirable criteria, and your suitability for the role. We value each and every one’s contribution as this builds our culture and means that if you work with us, you will be included, listened to, and respected.